diff --git a/java/src/processing/mode/java/pdex/PDEX.java b/java/src/processing/mode/java/pdex/PDEX.java
index 1e9dae51a..6f52fe5de 100644
--- a/java/src/processing/mode/java/pdex/PDEX.java
+++ b/java/src/processing/mode/java/pdex/PDEX.java
@@ -193,7 +193,7 @@ public class PDEX {
 
 
 
-  private class ShowUsage {
+  private static class ShowUsage {
 
     final JDialog window;
     final JTree tree;